from lister import *


class Super:
	def __init__(self):
		self.data1 = 'spam'

	def ham(self):
		pass


class Sub(Super, ListTree):
	def __init__(self):
		Super.__init__(self)
		self.data2 = 'eggs'
		self.data3 = 42

	def spam(self):
		pass


if __name__ == '__main__':
	X = Sub()
	print(X)
